Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 348757
Title Effects of interstitial refugia and current velocity on growth of the amphipod Gammarus pulex Linnaeus
Author(s) Franken, R.J.M.; Batten, S.; Beijer, J.A.J.; Gardeniers, J.J.P.; Scheffer, M.; Peeters, E.T.H.M.
Source Journal of the North American Benthological Society 25 (2006)3. - ISSN 0887-3593 - p. 656 - 663.
Department(s) Aquatic Ecology and Water Quality Management
WU Environmental SciencesDepartment of Environmental Sciences
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) fresh-water shrimps - small stony stream - lotic macroinvertebrates - community structure - flow refugia - pseudolimnaeus bousfield - river systems - drift - microdistribution - invertebrates
Abstract Substrate interstices influence the microdistribution and survival of benthic invertebrates. The benefits of interstitial refugium availability were quantified over 4 wk under baseflow conditions that are common to lowland streams in northwestern Europe. Effects on growth, feeding, and behavior of the amphipod Gammarus pulex L. were studied in 8 indoor artificial stream channels. Combinations of 2 near-bed flow velocities (3 and 9 cm/s) and 2 substrate types (medium sand and coarse gravel) were assigned to 32 experimental compartments. Growth of G. pulex was greater at 9 cm/s than at 3 cm/s, and G. pulex avoided bare sand and used gravel patches at both flow velocities. Food consumption was lower and individual growth was greater in gravel than in sand, a result that suggests that energetic costs were lower in gravel than in sand. We suggest that the interstitial refugia in gravel may have benefits beyond providing protection from flow. The presence of interstitial refugia may be of key importance to G. pulex, and the underlying mechanism of interstitial refugium use might be associated with the adaptation of organisms to seek refuge from predators
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